| Nintendo Game Boy Color cart. |  Jay und die Spielzeugdiebe Model CGB-BJYD-NOE | 2000 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo Game Boy Color cart. |  Jeff Gordon XS Racing Model DMG-AJZE-USA | 1999 | ASC Games |
| Nintendo Game Boy Color cart. | Jeremy McGrath Supercross 2000 Model CGB-AJUE-USA | 2000 | Acclaim Ent., Inc. Glen Cove, NY, USA |
| Nintendo Game Boy Color cart. | Jeremy McGrath Supercross 2000 Model CGB-AJUP-EUR | 2000 | Acclaim Ent., Inc. Glen Cove, NY, USA |
| Nintendo Game Boy Color cart. | Jet de Go! Model CGB-BJEJ-JPN | 2000 | Altron Corp. |
| Nintendo Game Boy Color cart. | Jim Henson's Bear in the Big Blue House Model CGB-BB7E-USA | 2002 | UBI Soft Ent., Inc. San Francisco, CA, USA 08888 |
| Nintendo Game Boy Color cart. | Jim Henson's Bear in the Big Blue House Model CGB-BBNP-EUR | 2002 | Ubisoft Ent. Montreuil sous Bois, France |
| Nintendo Game Boy Color cart. | Jimmy White's Cueball Model CGB-BJWP-EUR | 2000 | Vatical Ent. |
| Nintendo Game Boy Color cart. | Jin Yong Qun Xia Chuan II | 200? | Guangzhou Li Cheng China |
| Nintendo Game Boy Color cart. | Jing Ling Wang III | 200? | Sintax China |
| Nintendo Game Boy Color cart. | Jinsei Game - Tomodachi Takusan Tsukurou yo! Model DMG-ACJJ-JPN | 1999 | Takara Co., Ltd. Japan |
| Nintendo Game Boy Color cart. | Jisedai Begoma Battle Beyblade Model CGB-AG5J-JPN | 1999 | Hudson Soft. Hudson Group Japan |
| Nintendo Game Boy Color cart. | Jissen ni Yakudatsu Tsumego Model CGB-BJTJ-JPN | 2000 | Pony Canyon, Inc. Japan |
| Nintendo Game Boy Color cart. | Joryuu Janshi ni Chousen GB - Watashi-tachi ni Chousen Shitene Model DMG-A55J-JPN | 1999 | Culture Brain |
| Nintendo Game Boy Color cart. | Juedui Wuli | 200? | Sintax China |
| Nintendo Game Boy Color cart. | JumpStart Dino Adventure - Field Trip Model CGB-BJQE-USA | 2001 | Knowledge Adventure, Inc. |
| Nintendo Game Boy Color cart. | Jurassic Boy 2 Model EB-002 | 199? | Sachen Thin Chen co. Taiwan |
| Nintendo Game Boy Color cart. | Juukou Senki Bullet Battlers Model DMG-AZXJ-JPN | 1999 | Konami Co., Ltd. Japan |
| Nintendo Game Boy Color cart. | K.O. - The Pro Boxing Model CGB-BKOJ-JPN | 2000 | Altron Corp. |
| Nintendo Game Boy Color cart. | Kaitei Densetsu!! Treasure World Model DMG-BDTJ-JPN | 2000 | DaZZ Japan |
| Nintendo Game Boy Color cart. | Kakurenbo Battle Monster Tactics Model CGB-BMF-JPN | 2000 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Color cart. | Kakutou Ryouri Densetsu Bistro Recipe - Gekitou Foodon Battle-Hen Model DMG-AWRJ-JPN | 1999 | Banpresto Japan |
| Nintendo Game Boy Color cart. | Kakutou Ryouri Densetsu Bistro Recipe - Kettou Bistgarm-Hen Model DMG-A2WJ-JPN | 1999 | Banpresto Japan |
| Nintendo Game Boy Color cart. | Kanji Boy 2 Model DMG-A2CJ-JPN | 2000 | J-Wing |
| Nintendo Game Boy Color cart. | Kanji Boy 3 Model CGB-BK3J-JPN | 2003 | J-Wing |
| Nintendo Game Boy Color cart. | Kanji Boy Model DMG-AWKJ-JPN | 1999 | J-Wing |
| Nintendo Game Boy Color cart. | Kanji de Puzzle Model DMG-BKAJ-JPN | 2000 | M²TO, Inc. |
| Nintendo Game Boy Color cart. | Kanzume Monsters Parfait Model DMG-AQPJ-JPN | 1999 | Starfish, Inc. Japan |
| Nintendo Game Boy Color cart. | Karamuchou wa Oosawagi! Okawari! Model DMG-BOOJ-JPN | 2000 | Starfish, Inc. Japan |
| Nintendo Game Boy Color cart. | Karamuchou wa Oosawagi! Polinkies to Okashina Nakama-tachi Model DMG-AOPJ-JPN | 1998 | Starfish, Inc. Japan |
| Nintendo Game Boy Color cart. | Karan Koron Gakuen - Hanafuda Mahjong Model CGB-AHFJ-JPN | 2000 | J-Wing |
| Nintendo Game Boy Color cart. | Karate Joe | 199? | Unknown |
| Nintendo Game Boy Color cart. | Kaseki Sousei Reborn II - Monster Digger Model DMG-ARMJ-JPN | 1999 | Starfish, Inc. Japan |
| Nintendo Game Boy Color cart. | Katou Hifumi Kudan - Shougi Kyoushitsu Model DMG-AKHJ-JPN | 1999 | Culture Brain |
| Nintendo Game Boy Color cart. | Kawa no Nushi Tsuri 4 Model DMG-VUTJ-JPN | 1999 | Victor Interactive Soft., Inc. |
| Nintendo Game Boy Color cart. | Kawaii Pet Shop Monogatari 2 Model DMG-BMNJ-JPN | 2000 | Taito Corp. Japan |
| Nintendo Game Boy Color cart. | Kawaii Pet Shop Monogatari Model DMG-AEIJ-JPN | 1999 | Taito Corp. Japan |
| Nintendo Game Boy Color cart. | Käpt'n Blaubär - Die verrückte Schatzsuche Model CGB-BVRD-NOE | 2001 | Ravensburger Interactive |
| Nintendo Game Boy Color cart. | Keep the Balance Model CGB-BKNP-EUR | 2001 | JoWooD Productions AG |
| Nintendo Game Boy Color cart. | Keibajou e Ikou! Wide Model DMG-ASCJ-JPN | 2000 | HECT Hector Japan |
